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Schnorr SL. The soil in our microbial DNA informs about environmental interfaces across host and subsistence modalities. Philos Trans R Soc Lond B Biol Sci 2020; 375:20190577. [PMID: 33012224 DOI: 10.1098/rstb.2019.0577] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022] Open
Abstract
In this study, I use microbiome datasets from global soil samples and diverse hosts to learn whether soil microbial taxa are found in host microbiomes, and whether these observations fit the narrative that environmental interaction influences human microbiomes. A major motivation for conducting host-associated microbiome research is to contribute towards understanding how the environment may influence host physiology. The microbial molecular network is considered a key vector by which environmental traits may be transmitted to the host. Research on human evolution seeks evidence that can inform about the living experiences of human ancestors. This objective is substantially enhanced by recent work on ancient biomolecules from preserved microbial tissues, such as dental calculus, faecal sediments and whole coprolites. A challenge yet is to distinguish authentic biomolecules from environmental contaminants deposited contemporaneously, primarily from soil. However, we do not have sound expectations about the soil microbial elements arriving to host-associated microbiomes in a modern context. One assumption in human microbiome research is that proximity to the natural environment should affect biodiversity or impart genetic elements. I present evidence supporting the assumption that environmental soil taxa are found among host-associated gut taxa, which can recapitulate the surrounding host habitat ecotype. Soil taxa found in gut microbiomes relate to a set of universal 'core' taxa for all soil ecotypes, demonstrating that widespread host organisms may experience a consistent pattern of external environmental cues, perhaps critical for development. Observed differentiation of soil feature diversity, abundance and composition among human communities, great apes and invertebrate hosts also indicates that lifestyle patterns are inferable from an environmental signal that is retrievable from gut microbiome amplicon data. This article is part of the theme issue 'Insights into health and disease from ancient biomolecules'.
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Affiliation(s)
- Stephanie L Schnorr
- Department of Anthropology, University of Nevada, Las Vegas, NV, USA.,Konrad Lorenz Institute for Evolution and Cognition Research, Klosterneuburg, Austria
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52
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Yang TY, Gao Z, Liang NC. Sex-Dependent Wheel Running Effects on High Fat Diet Preference, Metabolic Outcomes, and Performance on the Barnes Maze in Rats. Nutrients 2020; 12:nu12092721. [PMID: 32899519 PMCID: PMC7551623 DOI: 10.3390/nu12092721] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2020] [Revised: 08/28/2020] [Accepted: 08/30/2020] [Indexed: 01/18/2023] Open
Abstract
Excessive and prolonged intake of highly palatable, high fat (HF) foods contributes to the pathogenesis of obesity, metabolic syndrome, and cognitive impairment. Exercise can restore energy homeostasis and suppress HF diet preference in rats. However, it is unclear if exercise confers similar protection against the detrimental outcomes associated with a chronic HF diet preference and feeding in both sexes. We used our wheel running (WR) and two-diet choice (chow vs. HF) paradigm to investigate the efficacy of exercise in reversing HF diet-associated metabolic and cognitive dysregulation in rats, hypothesizing that beneficial effects of exercise would be more pronounced in males. All WR rats showed HF diet avoidance upon running initiation, and males, but not females, had a prolonged reduction in HF diet preference. Moreover, exercise only improved glucose tolerance and insulin profile in males. Compared to sedentary controls, all WR rats improved learning to escape on the Barnes maze. Only WR females increased errors made during subsequent reversal learning trials, indicating a sex-dependent effect of exercise on behavioral flexibility. Taken together, our results suggest that exercise is more effective at attenuating HF-associated metabolic deficits in males, and highlights the importance of developing sex-specific treatment interventions for obesity and cognitive dysfunction.
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Affiliation(s)
- Tiffany Y. Yang
- Department of Psychology, College of Liberal Arts and Sciences, University of Illinois—Urbana-Champaign, Champaign, IL 61820, USA; (T.Y.Y.); (Z.G.)
| | - Zijun Gao
- Department of Psychology, College of Liberal Arts and Sciences, University of Illinois—Urbana-Champaign, Champaign, IL 61820, USA; (T.Y.Y.); (Z.G.)
| | - Nu-Chu Liang
- Department of Psychology, College of Liberal Arts and Sciences, University of Illinois—Urbana-Champaign, Champaign, IL 61820, USA; (T.Y.Y.); (Z.G.)
- Division of Nutritional Sciences, College of Agricultural, Consumer and Environmental Sciences, University of Illinois—Urbana-Champaign, Urbana, IL 61801, USA
- Neuroscience Program, College of Liberal Arts and Sciences, University of Illinois—Urbana-Champaign, Urbana, IL 61801, USA
- Correspondence: ; Tel.: +1-(217)-244-7873
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Pawera L, Khomsan A, Zuhud EA, Hunter D, Ickowitz A, Polesny Z. Wild Food Plants and Trends in Their Use: From Knowledge and Perceptions to Drivers of Change in West Sumatra, Indonesia. Foods 2020; 9:foods9091240. [PMID: 32899857 PMCID: PMC7555794 DOI: 10.3390/foods9091240] [Citation(s) in RCA: 35] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2020] [Revised: 08/31/2020] [Accepted: 09/01/2020] [Indexed: 12/15/2022] Open
Abstract
Wild food plants (WFPs) are often highly nutritious but under-consumed at the same time. This study aimed to document the diversity of WFPs, and assess perceptions, attitudes, and drivers of change in their consumption among Minangkabau and Mandailing women farmers in West Sumatra. We applied a mixed-method approach consisting of interviews with 200 women and focus group discussions with 68 participants. The study documented 106 WFPs (85 species), and Minangkabau were found to steward richer traditional knowledge than Mandailing. Although both communities perceived WFPs positively, consumption has declined over the last generation. The main reasons perceived by respondents were due to the decreased availability of WFPs and changes in lifestyle. The contemporary barriers to consuming WFPs were low availability, time constraints, and a limited knowledge of their nutritional value. The key motivations for their use were that they are free and “unpolluted” natural foods. The main drivers of change were socio-economic factors and changes in agriculture and markets. However, the persistence of a strong culture appears to slow dietary changes. The communities, government and NGOs should work together to optimize the use of this food biodiversity in a sustainable way. This integrated approach could improve nutrition while conserving biological and cultural diversity.
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Affiliation(s)
- Lukas Pawera
- Faculty of Tropical AgriSciences, Czech University of Life Sciences Prague, Kamýcká 129, 16500 Praha-Suchdol, Czech Republic;
- The Indigenous Partnership for Agrobiodiversity and Food Sovereignty, c/o The Alliance of Bioversity International and CIAT, Via dei Tre Denari 472, 00054 Rome, Italy
| | - Ali Khomsan
- Department of Community Nutrition, Faculty of Human Ecology, IPB University, Bogor 16680, Indonesia;
| | - Ervizal A.M. Zuhud
- Department of Forest Resources Conservation and Ecotourism, Faculty of Forestry, IPB University, Bogor 16680, Indonesia;
| | - Danny Hunter
- Alliance of Bioversity International and CIAT, via dei Tre Denari 472/a, 00054 Rome, Italy;
| | - Amy Ickowitz
- Center for International Forestry Research, Bogor 16115, Indonesia;
| | - Zbynek Polesny
- Faculty of Tropical AgriSciences, Czech University of Life Sciences Prague, Kamýcká 129, 16500 Praha-Suchdol, Czech Republic;
- Correspondence:
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Donders I, Barriocanal C. The Influence of Markets on the Nutrition Transition of Hunter-Gatherers: Lessons from the Western Amazon. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2020; 17:ijerph17176307. [PMID: 32872589 PMCID: PMC7504055 DOI: 10.3390/ijerph17176307] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/26/2020] [Revised: 08/24/2020] [Accepted: 08/26/2020] [Indexed: 11/16/2022]
Abstract
For many centuries, hunter-gatherer societies relied on subsistence practices and traditional diets. However, forces of globalization have increased market involvement, thereby fueling the nutrition transition of hunter-gatherer societies. We review the academic literature on market involvement of hunter-gatherer societies in the Western Amazon and its consequences on diet, health and well-being. First, we elaborate on four main determinants of market involvement (accessibility, monetary income, wild meat trade and social capital), showing how each determinant draws individuals toward or away from markets. Thereafter, we discuss how these determinants alter diet, health and well-being. Our results add to the understanding of the complex relations between market involvement, dietary change, health and well-being of indigenous societies. Furthermore, they bring to light that additional research is needed on the topic to support decision-makers and help preserve indigenous values.
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Affiliation(s)
- Isabella Donders
- Institute of Environmental Science and Technology (ICTA), Autonomous University of Barcelona (UAB), Building Z, Campus UAB, 08193 Bellaterra, Barcelona, Spain;
- Correspondence:
| | - Carles Barriocanal
- Institute of Environmental Science and Technology (ICTA), Autonomous University of Barcelona (UAB), Building Z, Campus UAB, 08193 Bellaterra, Barcelona, Spain;
- Department of Geography, University of Barcelona (UB), Montalegre 6, 08001 Barcelona, Spain
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Salali GD, Dyble M, Chaudhary N, Sikka G, Derkx I, Keestra SM, Smith D, Thompson J, Vinicius L, Migliano AB. Global WEIRDing: transitions in wild plant knowledge and treatment preferences in Congo hunter-gatherers. EVOLUTIONARY HUMAN SCIENCES 2020; 2:e24. [PMID: 37588372 PMCID: PMC10427474 DOI: 10.1017/ehs.2020.26] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Abstract
Cultures around the world are converging as populations become more connected. On the one hand this increased connectedness can promote the recombination of existing cultural practices to generate new ones, but on the other it may lead to the replacement of traditional practices and global WEIRDing. Here we examine the process and causes of changes in cultural traits concerning wild plant knowledge in Mbendjele BaYaka hunter-gatherers from Congo. Our results show that the BaYaka who were born in town reported knowing and using fewer plants than the BaYaka who were born in forest camps. Plant uses lost in the town-born BaYaka related to medicine. Unlike the forest-born participants, the town-born BaYaka preferred Western medicine over traditional practices, suggesting that the observed decline of plant knowledge and use is the result of replacement of cultural practices with the new products of cumulative culture.
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Affiliation(s)
- Gul Deniz Salali
- Department of Anthropology, University College London, LondonWC1H 0BW, UK
| | - Mark Dyble
- Department of Anthropology, University College London, LondonWC1H 0BW, UK
| | - Nikhil Chaudhary
- Department of Anthropology, University College London, LondonWC1H 0BW, UK
- Leverhulme Centre for Human Evolutionary Studies, Department of Archaeology, University of Cambridge, Cambridge, CB2 1QH, UK
| | - Gaurav Sikka
- Department of Anthropology, University College London, LondonWC1H 0BW, UK
| | - Inez Derkx
- Department of Anthropology, University College London, LondonWC1H 0BW, UK
- Department of Anthropology, University of Zurich, 8057Zürich, Switzerland
| | - Sarai M. Keestra
- Department of Anthropology, University College London, LondonWC1H 0BW, UK
- Department of Anthropology, Durham University, DurhamDH1 3LE, UK
| | - Daniel Smith
- Department of Anthropology, University College London, LondonWC1H 0BW, UK
- Bristol Medical School: Population Health Sciences, University of Bristol, BristolBS8 2BN, UK
| | - James Thompson
- Department of Anthropology, University College London, LondonWC1H 0BW, UK
| | - Lucio Vinicius
- Department of Anthropology, University College London, LondonWC1H 0BW, UK
- Department of Anthropology, University of Zurich, 8057Zürich, Switzerland
| | - Andrea Bamberg Migliano
- Department of Anthropology, University College London, LondonWC1H 0BW, UK
- Department of Anthropology, University of Zurich, 8057Zürich, Switzerland
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56
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Inflammatory bowel diseases, the hygiene hypothesis and the other side of the microbiota: Parasites and fungi. Pharmacol Res 2020; 159:104962. [PMID: 32480001 DOI: 10.1016/j.phrs.2020.104962] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/26/2020] [Revised: 05/22/2020] [Accepted: 05/22/2020] [Indexed: 12/26/2022]
Abstract
This review tackles the concept of the evolutionary mismatch, in relation with the reduction of the prevalence of the so-called "dirty old friends". These formed the variegated community of parasites and microorganisms, either prokaryotic or eukaryotic, that, over long evolutionary times, co-evolved with humans and their ancestors, inhabiting their digestive tracts, and other body districts. This community of microbial symbionts and metazoan parasites is thought to have evolved a complex network of inter-independence with the host, in particular in relation with their immune stimulating capacity, and with the consequent adaptation of the host immune response to this chronic stimulation. Strictly related to this evolutionary mismatch, the hygiene hypothesis, proposed by David Strachan in 1989, foresees that the increase in the incidence of inflammatory and autoimmune disorders during the twentieth century has been caused by the reduced exposure to parasites and microorganisms, especially in industrialized countries. Among these pathologies, inflammatory bowel diseases (IBDs) occupy a prominent role. From these premises, this review summarizes current knowledge on how variations in the composition of the gut bacterial microbiota, as well as its interactions with fungal communities, influence the overall immune balance, favouring or counteracting gut inflammation in IBDs. Additionally, the effect of worm parasites, either directly on the immune balance, or indirectly, through the modulation of bacterial and fungal microbiota, will be addressed. Finally, we will review a series of studies related to the use of molecules derived from parasitic worms and fungi, which hold the potential to be developed as postbiotics for the treatment of IBDs.
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57
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Large-scale genome-wide analysis links lactic acid bacteria from food with the gut microbiome. Nat Commun 2020; 11:2610. [PMID: 32451391 PMCID: PMC7248083 DOI: 10.1038/s41467-020-16438-8] [Citation(s) in RCA: 149] [Impact Index Per Article: 37.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2020] [Accepted: 05/01/2020] [Indexed: 01/15/2023] Open
Abstract
Lactic acid bacteria (LAB) are fundamental in the production of fermented foods and several strains are regarded as probiotics. Large quantities of live LAB are consumed within fermented foods, but it is not yet known to what extent the LAB we ingest become members of the gut microbiome. By analysis of 9445 metagenomes from human samples, we demonstrate that the prevalence and abundance of LAB species in stool samples is generally low and linked to age, lifestyle, and geography, with Streptococcus thermophilus and Lactococcus lactis being most prevalent. Moreover, we identify genome-based differences between food and gut microbes by considering 666 metagenome-assembled genomes (MAGs) newly reconstructed from fermented food microbiomes along with 154,723 human MAGs and 193,078 reference genomes. Our large-scale genome-wide analysis demonstrates that closely related LAB strains occur in both food and gut environments and provides unprecedented evidence that fermented foods can be indeed regarded as a possible source of LAB for the gut microbiome.
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58
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Scelza BA, Hinde K. Crucial Contributions : A Biocultural Study of Grandmothering During the Perinatal Period. HUMAN NATURE-AN INTERDISCIPLINARY BIOSOCIAL PERSPECTIVE 2020; 30:371-397. [PMID: 31802396 PMCID: PMC6911617 DOI: 10.1007/s12110-019-09356-2] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
Maternal grandmothers play a key role in allomaternal care, directly caring for and provisioning their grandchildren as well as helping their daughters with household chores and productive labor. Previous studies have investigated these contributions across a broad time period, from infancy through toddlerhood. Here, we extend and refine the grandmothering literature to investigate the perinatal period as a critical window for grandmaternal contributions. We propose that mother-daughter co-residence during this period affords targeted grandmaternal effort during a period of heightened vulnerability and appreciable impact. We conducted two focus groups and 37 semi-structured interviews with Himba women. Interviews focused on experiences from their first and, if applicable, their most recent birth and included information on social support, domains of teaching and learning, and infant feeding practices. Our qualitative findings reveal three domains in which grandmothers contribute: learning to mother, breastfeeding support, and postnatal health and well-being. We show that informational, emotional, and instrumental support provided to new mothers and their neonates during the perinatal period can aid in the establishment of the mother-infant bond, buffer maternal energy balance, and improve nutritional outcomes for infants. These findings demonstrate that the role of grandmother can be crucial, even when alloparenting is common and breastfeeding is frequent and highly visible. Situated within the broader anthropological and clinical literature, these findings substantiate the claim that humans have evolved in an adaptive sociocultural perinatal complex in which grandmothers provide significant contributions to the health and well-being of their reproductive-age daughters and grandchildren.
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Affiliation(s)
- Brooke A Scelza
- Department of Anthropology, UCLA, Los Angeles, CA, 90095-1553, USA. .,Center for Behavior, Evolution and Culture, UCLA, Los Angeles, CA, 90095-1553, USA.
| | - Katie Hinde
- School of Human Evolution and Social Change, Arizona State University, Tempe, AZ, 85287, USA.,Center for Evolution and Medicine, Arizona State University, Tempe, AZ, 85287, USA
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59
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60
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Abstract
Adrenarche, the post-natal rise of DHEA and DHEAS, is unique to humans and the African Apes. Recent findings have linked DHEA in humans to the development of the left dorsolateral prefrontal cortex (LDPFC) between the ages of 4-8 years and the right temporoparietal junction (rTPJ) from 7 to 12 years of age. Given the association of the LDLPFC with the 5-to-8 transition and the rTPJ with mentalizing during middle childhood DHEA may have played an important role in the evolution of the human brain. I argue that increasing protein in the diet over the course of human evolution not only increased levels of DHEAS, but linked meat consumption with brain development during the important 5- to-8 transition. Consumption of animal protein has been associated with IGF-1, implicated in the development of the adrenal zona reticularis (ZR), the site of DHEAS production. In humans and chimps, the zona reticularis emerges at 3-4 years, along with the onset of DHEA/S production. For chimps this coincides with weaning and peak synaptogenesis. Among humans, weaning is completed around 2 ½ years, while synaptogenesis peaks around 5 years. Thus, in chimpanzees, early cortical maturation is tied to the mother; in humans it may be associated with post-weaning provisioning by others. I call for further research on adrenarche among the African apes as a critical comparison to humans. I also suggest research in subsistence populations to establish the role of nutrition and energetics in the timing of adrenarche and the onset of middle childhood.
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61
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Lew-Levy S, Kissler SM, Boyette AH, Crittenden AN, Mabulla IA, Hewlett BS. Who teaches children to forage? Exploring the primacy of child-to-child teaching among Hadza and BaYaka Hunter-Gatherers of Tanzania and Congo. EVOL HUM BEHAV 2020. [DOI: 10.1016/j.evolhumbehav.2019.07.003] [Citation(s) in RCA: 43] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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62
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Friant S, Ayambem WA, Alobi AO, Ifebueme NM, Otukpa OM, Ogar DA, Alawa CBI, Goldberg TL, Jacka JK, Rothman JM. Life on the Rainforest Edge: Food Security in the Agricultural-Forest Frontier of Cross River State, Nigeria. FRONTIERS IN SUSTAINABLE FOOD SYSTEMS 2019. [DOI: 10.3389/fsufs.2019.00113] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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63
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Chester B, Babu JR, Greene MW, Geetha T. The effects of popular diets on type 2 diabetes management. Diabetes Metab Res Rev 2019; 35:e3188. [PMID: 31121637 DOI: 10.1002/dmrr.3188] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/12/2018] [Revised: 05/09/2019] [Accepted: 05/17/2019] [Indexed: 12/23/2022]
Abstract
Type 2 diabetes can be managed with the use of diabetes self-management skills. Diet and exercise are essential segments of the lifestyle changes necessary for diabetes management. However, diet recommendations can be complicated in a world full of different diets. This review aims to evaluate the evidence on the effects of three popular diets geared towards diabetes management: low-carbohydrate and ketogenic diet, vegan diet, and the Mediterranean diet. While all three diets have been shown to assist in improving glycaemic control and weight loss, patient adherence, acceptability, and long-term manageability play essential roles in the efficacy of each diet.
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Affiliation(s)
- Brittannie Chester
- Department of Nutrition, Dietetics, and Hospitality Management, Auburn University, Auburn, Alabama
| | - Jeganathan Ramesh Babu
- Department of Nutrition, Dietetics, and Hospitality Management, Auburn University, Auburn, Alabama
- Boshell Metabolic Diseases and Diabetes Program, Auburn University, Auburn, Alabama
- Center for Neuroscience Initiative, Auburn University, Auburn, Alabama
| | - Michael W Greene
- Department of Nutrition, Dietetics, and Hospitality Management, Auburn University, Auburn, Alabama
- Boshell Metabolic Diseases and Diabetes Program, Auburn University, Auburn, Alabama
- Center for Neuroscience Initiative, Auburn University, Auburn, Alabama
| | - Thangiah Geetha
- Department of Nutrition, Dietetics, and Hospitality Management, Auburn University, Auburn, Alabama
- Boshell Metabolic Diseases and Diabetes Program, Auburn University, Auburn, Alabama
- Center for Neuroscience Initiative, Auburn University, Auburn, Alabama
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64
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Lewis CM, McCall LI, Sharp RR, Spicer PG. Ethical priority of the most actionable system of biomolecules: the metabolome. AMERICAN JOURNAL OF PHYSICAL ANTHROPOLOGY 2019; 171:177-181. [PMID: 31643083 PMCID: PMC7003909 DOI: 10.1002/ajpa.23943] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/16/2019] [Revised: 09/26/2019] [Accepted: 10/01/2019] [Indexed: 11/06/2022]
Abstract
The metabolome is a system of small biomolecules (metabolites) and a direct result of human bioculture. Consequently, metabolomics is well poised to impact anthropological and biomedical research for the foreseeable future. Overall, we provide a perspective on the ethical, legal, and social implications (ELSI) of metabolomics, which we argue are often more alarming than those of genomics. Given the current mechanisms to fund research, ELSI beyond human DNA is stifled and in need of considerable attention.
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Affiliation(s)
- Cecil M Lewis
- University of Oklahoma (OU) College of Arts and Sciences, Norman, OK.,OU Center on the Ethics of Indigenous Genomic Research, Norman, OK.,OU Stephenson Cancer Center, Norman, OK.,OU Laboratories of Molecular Anthropology and Microbiome Research, Norman, OK.,OU Department of Anthropology, Norman, OK
| | - Laura-Isobel McCall
- University of Oklahoma (OU) College of Arts and Sciences, Norman, OK.,OU Stephenson Cancer Center, Norman, OK.,OU Laboratories of Molecular Anthropology and Microbiome Research, Norman, OK.,OU Department of Chemistry and Biochemistry, Norman, OK.,OU Department of Microbiology and Plant Biology, Norman, OK
| | | | - Paul G Spicer
- University of Oklahoma (OU) College of Arts and Sciences, Norman, OK.,OU Center on the Ethics of Indigenous Genomic Research, Norman, OK.,OU Stephenson Cancer Center, Norman, OK.,OU Department of Anthropology, Norman, OK
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65
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Fasting as a Therapy in Neurological Disease. Nutrients 2019; 11:nu11102501. [PMID: 31627405 PMCID: PMC6836141 DOI: 10.3390/nu11102501] [Citation(s) in RCA: 47] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2019] [Revised: 10/12/2019] [Accepted: 10/15/2019] [Indexed: 12/16/2022] Open
Abstract
Fasting is deeply entrenched in evolution, yet its potential applications to today’s most common, disabling neurological diseases remain relatively unexplored. Fasting induces an altered metabolic state that optimizes neuron bioenergetics, plasticity, and resilience in a way that may counteract a broad array of neurological disorders. In both animals and humans, fasting prevents and treats the metabolic syndrome, a major risk factor for many neurological diseases. In animals, fasting probably prevents the formation of tumors, possibly treats established tumors, and improves tumor responses to chemotherapy. In human cancers, including cancers that involve the brain, fasting ameliorates chemotherapy-related adverse effects and may protect normal cells from chemotherapy. Fasting improves cognition, stalls age-related cognitive decline, usually slows neurodegeneration, reduces brain damage and enhances functional recovery after stroke, and mitigates the pathological and clinical features of epilepsy and multiple sclerosis in animal models. Primarily due to a lack of research, the evidence supporting fasting as a treatment in human neurological disorders, including neurodegeneration, stroke, epilepsy, and multiple sclerosis, is indirect or non-existent. Given the strength of the animal evidence, many exciting discoveries may lie ahead, awaiting future investigations into the viability of fasting as a therapy in neurological disease.
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66
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Schubel JR, Thompson K. Farming the Sea: The Only Way to Meet Humanity's Future Food Needs. GEOHEALTH 2019; 3:238-244. [PMID: 32159044 PMCID: PMC7007165 DOI: 10.1029/2019gh000204] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/29/2019] [Revised: 08/15/2019] [Accepted: 08/19/2019] [Indexed: 05/29/2023]
Abstract
A major change began 10,000-12,000 years ago when humans began to practice agriculture. A series of "green revolutions" enabled the human population to explode, but these advancements have dramatically changed the planet. The United Nations predicts that we will need to produce 50% more food by 2050 to feed another 2.5 billion people, but this will be challenging with tighter land and water resources and a changing climate. Responsible marine aquaculture can complement responsible land-based agriculture and aquaculture and well-managed fisheries to increase the global supply of nutritious food.
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67
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68
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Pathways to cognitive design. Behav Processes 2019; 161:73-86. [DOI: 10.1016/j.beproc.2018.05.013] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2017] [Revised: 05/01/2018] [Accepted: 05/22/2018] [Indexed: 11/19/2022]
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69
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Abstract
Perturbed diurnal rhythms are becoming increasingly evident as deleterious events in the pathology of metabolic diseases. Exercise is well characterized as a crucial intervention in the prevention and treatment of individuals with metabolic diseases. Little is known, however, regarding optimizing the timing of exercise bouts in order to maximize their health benefits. Furthermore, exercise is a potent modulator of skeletal muscle metabolism, and it is clear that skeletal muscle has a strong circadian profile. In humans, mitochondrial function peaks in the late afternoon, and the circadian clock might be inherently impaired in myotubes from patients with metabolic disease. Timing exercise bouts to coordinate with an individual's circadian rhythms might be an efficacious strategy to optimize the health benefits of exercise. The role of exercise as a Zeitgeber can also be used as a tool in combating metabolic disease. Shift work is known to induce acute insulin resistance, and appropriately timed exercise might improve health markers in shift workers who are at risk of metabolic disease. In this Review, we discuss the literature regarding diurnal skeletal muscle metabolism and the interaction with exercise bouts at different times of the day to combat metabolic disease.
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Affiliation(s)
- Brendan M Gabriel
- Department of Physiology and Pharmacology, Karolinska Institutet, Stockholm, Sweden
| | - Juleen R Zierath
- Department of Physiology and Pharmacology, Karolinska Institutet, Stockholm, Sweden.
- Department of Molecular Medicine and Surgery, Section of Integrative Physiology, Karolinska Institutet, Stockholm, Sweden.
- The Novo Nordisk Foundation Center for Basic Metabolic Research, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark.
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70
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Chenard CA, Rubenstein LM, Snetselaar LG, Wahls TL. Nutrient Composition Comparison between a Modified Paleolithic Diet for Multiple Sclerosis and the Recommended Healthy U.S.-Style Eating Pattern. Nutrients 2019; 11:nu11030537. [PMID: 30832289 PMCID: PMC6470485 DOI: 10.3390/nu11030537] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2019] [Revised: 02/17/2019] [Accepted: 02/20/2019] [Indexed: 01/04/2023] Open
Abstract
Multiple sclerosis (MS) is a demyelinating disease that attacks the central nervous system. Evidence-based dietary guidelines do not exist for MS; the default advice is to follow the Dietary Guidelines for Americans (DGA). A modified Paleolithic Wahls Elimination (WahlsElim) diet promoted for MS excludes grains and dairy and encourages 9+ cups fruits and vegetables (F/V) and saturated fat for cooking. This study evaluated the nutritional adequacy of seven-day menus and modeled them with varying amounts of F/V for comparison with the DGA Healthy US-Style Eating Pattern (HEP) for ages 31–50 years. WahlsElim menus had low added sugar and glycemic index. Nutritional adequacy of the menus and modeled versions were similar to HEP for 17 vitamins and minerals (mean adequacy ratio ≥92%). Nutrient shortfalls for the modeled diet with 60% F/V were identical to HEP for vitamin D, iron (females), magnesium (marginally males), choline and potassium; this modeled diet was also low in dietary fiber and calcium but met vitamin E requirements while HEP did not. WahlsElim-prescribed supplements corrected vitamin D and magnesium shortfalls; careful selection of foods are needed to meet requirements of other shortfall nutrients and reduce saturated fat and sodium. Doctors should monitor nutritional status, supplement doses, and possible contraindications to high vitamin K intake in individuals following the WahlsElim diet.
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Affiliation(s)
- Catherine A Chenard
- Department of Internal Medicine, University of Iowa, Iowa City, IA 52242, USA.
| | - Linda M Rubenstein
- Department of Epidemiology, College of Public Health, University of Iowa, Iowa City, IA 52242, USA.
| | - Linda G Snetselaar
- Department of Epidemiology, College of Public Health, University of Iowa, Iowa City, IA 52242, USA.
| | - Terry L Wahls
- Department of Internal Medicine, University of Iowa, Iowa City, IA 52242, USA.
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71
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Moossavi S, Bishehsari F. Microbes: possible link between modern lifestyle transition and the rise of metabolic syndrome. Obes Rev 2019; 20:407-419. [PMID: 30548384 DOI: 10.1111/obr.12784] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/12/2018] [Revised: 09/10/2018] [Accepted: 09/11/2018] [Indexed: 12/13/2022]
Abstract
The rapid decrease in infectious diseases globally has coincided with an increase in the prevalence of obesity and other components of metabolic syndrome. Insulin resistance is a common feature of metabolic syndrome and can be influenced by genetic and non-genetic/environmental factors. The emergence of metabolic syndrome epidemics over only a few decades suggests a more prominent role of the latter. Changes in our environment and lifestyle have indeed paralleled the rise in metabolic syndrome. Gastrointestinal tract microbiota, the composition of which plays a significant role in host physiology, including metabolism and energy homeostasis, are distinctly different within the context of metabolic syndrome. Among humans, recent lifestyle-related changes could be linked to changes in diversity and composition of 'ancient' microbiota. Given the co-adaptation and co-evolution of microbiota with the immune system over a long period of time, it is plausible that such lifestyle-related microbiota changes could trigger aberrant immune responses, thereby predisposing an individual to a variety of diseases. Here, we review current evidence supporting a role for gut microbiota in the ongoing rise of metabolic syndrome. We conclude that population-level shifts in microbiota can play a mediatory role between lifestyle factors and pathogenesis of insulin resistance and metabolic syndrome.
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Affiliation(s)
- S Moossavi
- Digestive Oncology Research Center, Digestive Disease Research Institute, Tehran University of Medical Sciences, Tehran, Iran.,Department of Medical Microbiology and Infectious Diseases, University of Manitoba, Winnipeg, MB, Canada
| | - F Bishehsari
- Department of Internal Medicine, Division of Gastroenterology, Rush University Medical Center, Chicago, IL, USA
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72
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Reyes-García V, Powell B, Díaz-Reviriego I, Fernández-Llamazares Á, Gallois S, Gueze M. Dietary transitions among three contemporary hunter-gatherers across the tropics. Food Secur 2019. [DOI: 10.1007/s12571-018-0882-4] [Citation(s) in RCA: 30] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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73
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Meanings, measurements, and musings on the significance of patterns in human microbiome variation. Curr Opin Genet Dev 2018; 53:43-52. [DOI: 10.1016/j.gde.2018.06.014] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2018] [Revised: 06/25/2018] [Accepted: 06/26/2018] [Indexed: 01/23/2023]
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74
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Samson DR, Crittenden AN, Mabulla IA, Mabulla AZ, Nunn CL. Does the moon influence sleep in small-scale societies? Sleep Health 2018; 4:509-514. [DOI: 10.1016/j.sleh.2018.08.004] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2018] [Revised: 06/28/2018] [Accepted: 08/07/2018] [Indexed: 12/12/2022]
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75
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Coker RH, Coker MS, Bartlett L, Murphy CJ, Priebe K, Shriver TC, Schoeller DA, Ruby BC. The energy requirements and metabolic benefits of wilderness hunting in Alaska. Physiol Rep 2018; 6:e13925. [PMID: 30430767 PMCID: PMC6236107 DOI: 10.14814/phy2.13925] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2018] [Accepted: 10/22/2018] [Indexed: 11/24/2022] Open
Abstract
The purported healthy aspects of subsistence foods have led to the popularity of the Paleo diet. There has been very little focus, surprisingly, on health benefits derived from the nomadic nature of humans during the Paleolithic era. The purpose of our study was to examine total energy expenditure (TEE), total energy intake (TEI), body composition, blood lipids, and intrahepatic lipid in humans during a 12-day Alaskan backcountry expeditionary hunting (ABEH) immersion. Four healthy men (age: 42 ± 3 year, BMI: 27 ± 1 kg/m2 ) were recruited for the study. TEE was measured using the doubly labeled water method and a food diary was utilized to assess TEI. Body composition was measured using dual energy X-ray absorptiometry (DXA); cross-sectional area of the thigh (XT) and intrahepatic lipid (IHL) were measured using molecular imaging. Blood samples were collected for the measurement of blood lipids. DXA, XT, IHL, and blood data were collected pre- and immediately post-ABEH. Results were analyzed using paired t-tests and considered significant at P < 0.05. TEE and TEI averaged 18.1 ± 1.2 and 9.1 ± 2.5 MJ/day, respectively, indicating substantial negative energy balance (-9.0 ± 1.3 MJ/day). There was a reduction in percent body fat (∆-3.3 ± 0.2%), total fat mass (∆-3.3 ± 0.4 kg), and visceral fat volume (Δ-261 ± 188 cm3 ). Lean tissue mass and XT was unchanged. There was a decrease in IHL (Δ-0.5 ± 0.1% water peak), and a trend (P = 0.055) toward reduction in LDL-cholesterol. We conclude that constancy of physical activity during negative energy balance may provide metabolic benefits above and beyond variations in diet that exist with the hunter-gatherer lifestyle.
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Affiliation(s)
- Robert H. Coker
- Institute of Arctic BiologyUniversity of Alaska FairbanksFairbanksAlaska
| | - Melynda S. Coker
- School of ManagementUniversity of Alaska FairbanksFairbanksAlaska
| | | | - Carl J. Murphy
- Isotope Ratio Core LaboratoryUniversity of Wisconsin‐MadisonMadisonWisconsin
| | - Karolina Priebe
- Institute of Arctic BiologyUniversity of Alaska FairbanksFairbanksAlaska
| | - Timothy C. Shriver
- Isotope Ratio Core LaboratoryUniversity of Wisconsin‐MadisonMadisonWisconsin
| | - Dale A. Schoeller
- Isotope Ratio Core LaboratoryUniversity of Wisconsin‐MadisonMadisonWisconsin
| | - Brent C. Ruby
- Montana Center for Work Physiology and Exercise MetabolismUniversity of MontanaMissoulaMontana
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76
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Pezo-Lanfranco L. Evidence of variability in carbohydrate consumption in prehistoric fisher-hunter-gatherers of Southeastern Brazil: Spatiotemporal trends of oral health markers. AMERICAN JOURNAL OF PHYSICAL ANTHROPOLOGY 2018; 167:507-523. [PMID: 30159869 DOI: 10.1002/ajpa.23681] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/24/2018] [Revised: 06/16/2018] [Accepted: 06/19/2018] [Indexed: 01/10/2023]
Abstract
OBJECTIVES In this study, we evaluate the role of plants in the diet of fisher-hunter gatherers adapted to highly productive coastal environments. Oral health markers were used to track spatiotemporal variations (regional and diachronic) in the composition of carbohydrate in the diets of prehistoric shell mound builders (sambaqui) from the Southeast of Brazil. Our main objective is to test the supposed stability in the dietary habits of sambaqui populations and identify modulating effects of chronological, cultural, and/or ecological factors. METHODS Eighteen oral health markers (divided into three categories: caries, periodontal disease, and dental wear) were applied in 233 individuals from 7 sambaquis (dated between 4800 and 1100 BP) from 5 geographic regions. RESULTS Our results reveal variable oral health patterns among sites. Despite that, we found a number of common features, such as dental wear and associated pulp lesions. Some oral health patterns are compatible with cariogenic diets and high carbohydrate consumption. CONCLUSIONS Our analyses suggest that plant resource management is plausible at some sites and support the emerging evidence that plant consumption among sambaqui populations was driven more by ecologic factors than chronological or cultural ones. A comprehensive record of oral health markers shows promise as a methodology to differentiate between otherwise extremely similar diets.
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Affiliation(s)
- Luis Pezo-Lanfranco
- Laboratório de Antropologia Biológica, Departamento de Genética e Biologia Evolutiva, Instituto de Biociências - Universidade de São Paulo, São Paulo, Brazil
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77
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Pérez-Jaramillo JE, Carrión VJ, de Hollander M, Raaijmakers JM. The wild side of plant microbiomes. MICROBIOME 2018; 6:143. [PMID: 30115122 PMCID: PMC6097318 DOI: 10.1186/s40168-018-0519-z] [Citation(s) in RCA: 110] [Impact Index Per Article: 18.3] [Reference Citation Analysis] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/16/2018] [Accepted: 07/17/2018] [Indexed: 05/18/2023]
Affiliation(s)
- Juan E Pérez-Jaramillo
- Department of Microbial Ecology, Netherlands Institute of Ecology (NIOO-KNAW), P.O. Box 50, 6708 PB, Wageningen, The Netherlands
- Institute of Biology, Leiden University, Sylviusweg 72, 2333 BE, Leiden, The Netherlands
| | - Víctor J Carrión
- Department of Microbial Ecology, Netherlands Institute of Ecology (NIOO-KNAW), P.O. Box 50, 6708 PB, Wageningen, The Netherlands
| | - Mattias de Hollander
- Department of Microbial Ecology, Netherlands Institute of Ecology (NIOO-KNAW), P.O. Box 50, 6708 PB, Wageningen, The Netherlands
| | - Jos M Raaijmakers
- Department of Microbial Ecology, Netherlands Institute of Ecology (NIOO-KNAW), P.O. Box 50, 6708 PB, Wageningen, The Netherlands.
- Institute of Biology, Leiden University, Sylviusweg 72, 2333 BE, Leiden, The Netherlands.
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78
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Zhou X, Du L, Shi R, Chen Z, Zhou Y, Li Z. Early-life food nutrition, microbiota maturation and immune development shape life-long health. Crit Rev Food Sci Nutr 2018; 59:S30-S38. [PMID: 29874476 DOI: 10.1080/10408398.2018.1485628] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
The current knowledge about early-life nutrition and environmental factors that affect the interaction between the symbiotic microbiota and the host immune system has demonstrated novel regulatory target for treating allergic diseases, autoimmune disorders and metabolic syndrome. Various kinds of food nutrients (such as dietary fiber, starch, polyphenols and proteins) can provide energy resources for both intestinal microbiota and the host. The indigestible food components are fermented by the indigenous gut microbiota to produce diverse metabolites, including short-chain fatty acids, bile acids and trimethylamine-N-oxide, which can regulate the host metabolized physiology, immunity homeostasis and health state. Therefore it is commonly believed early-life perturbation of the microbial community structure and the dietary nutrition interference on the child mucosal immunity contribute to the whole life susceptibility to chronic diseases. In all, the combined interrelationship between food ingredients nutrition, intestinal microbiota configurations and host system immunity provides new therapeutic targets to treat various kinds of pathogenic inflammations and chronic diseases.
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Affiliation(s)
- Xiaoli Zhou
- a Shanghai Institute of Technology , Shanghai , China
| | - Lina Du
- a Shanghai Institute of Technology , Shanghai , China
| | - Ronghua Shi
- a Shanghai Institute of Technology , Shanghai , China
| | - Zhidong Chen
- a Shanghai Institute of Technology , Shanghai , China
| | - Yiming Zhou
- a Shanghai Institute of Technology , Shanghai , China
| | - Zongjie Li
- a Shanghai Institute of Technology , Shanghai , China
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79
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Dental calculus indicates widespread plant use within the stable Neanderthal dietary niche. J Hum Evol 2018; 119:27-41. [DOI: 10.1016/j.jhevol.2018.02.009] [Citation(s) in RCA: 48] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2017] [Revised: 02/07/2018] [Accepted: 02/16/2018] [Indexed: 11/18/2022]
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80
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Anton SD, Moehl K, Donahoo WT, Marosi K, Lee S, Mainous AG, Leeuwenburgh C, Mattson MP. Flipping the Metabolic Switch: Understanding and Applying the Health Benefits of Fasting. Obesity (Silver Spring) 2018; 26:254-268. [PMID: 29086496 PMCID: PMC5783752 DOI: 10.1002/oby.22065] [Citation(s) in RCA: 336] [Impact Index Per Article: 56.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/06/2017] [Revised: 09/14/2017] [Accepted: 09/26/2017] [Indexed: 12/12/2022]
Abstract
OBJECTIVE Intermittent fasting (IF) is a term used to describe a variety of eating patterns in which no or few calories are consumed for time periods that can range from 12 hours to several days, on a recurring basis. This review is focused on the physiological responses of major organ systems, including the musculoskeletal system, to the onset of the metabolic switch: the point of negative energy balance at which liver glycogen stores are depleted and fatty acids are mobilized (typically beyond 12 hours after cessation of food intake). RESULTS AND CONCLUSIONS Emerging findings suggest that the metabolic switch from glucose to fatty acid-derived ketones represents an evolutionarily conserved trigger point that shifts metabolism from lipid/cholesterol synthesis and fat storage to mobilization of fat through fatty acid oxidation and fatty acid-derived ketones, which serve to preserve muscle mass and function. Thus, IF regimens that induce the metabolic switch have the potential to improve body composition in overweight individuals. Moreover, IF regimens also induce the coordinated activation of signaling pathways that optimize physiological function, enhance performance, and slow aging and disease processes. Future randomized controlled IF trials should use biomarkers of the metabolic switch (e.g., plasma ketone levels) as a measure of compliance and of the magnitude of negative energy balance during the fasting period.
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Affiliation(s)
- Stephen D. Anton
- Department of Aging and Geriatric Research, Institute on Aging, Department of Clinical and Health Psychology, University of Florida, Gainesville, FL 32610
| | - Keelin Moehl
- Laboratory of Neurosciences, National Institute on Aging Intramural Research Program, Baltimore, MD 21224
| | - William T. Donahoo
- Division of Endocrinology, Diabetes and Metabolism, University of Florida College of Medicine, Gainesville, FL 32610
| | - Krisztina Marosi
- Laboratory of Neurosciences, National Institute on Aging Intramural Research Program, Baltimore, MD 21224
| | - Stephanie Lee
- Department of Aging and Geriatric Research, Institute on Aging, Department of Clinical and Health Psychology, University of Florida, Gainesville, FL 32610
| | - Arch G. Mainous
- Department of Health Services Research, Management and Policy; Department of Community Health and Family Medicine, University of Florida, Gainesville, FL 32610
| | - Christiaan Leeuwenburgh
- Department of Aging and Geriatric Research, Institute on Aging, Department of Clinical and Health Psychology, University of Florida, Gainesville, FL 32610
| | - Mark P. Mattson
- Laboratory of Neurosciences, National Institute on Aging Intramural Research Program, Baltimore, MD 21224
- Department of Neuroscience, Johns Hopkins University School of Medicine, Baltimore, MD 21205
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81
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The evolution of human sleep: Technological and cultural innovation associated with sleep-wake regulation among Hadza hunter-gatherers. J Hum Evol 2017; 113:91-102. [PMID: 29054171 DOI: 10.1016/j.jhevol.2017.08.005] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2016] [Revised: 08/03/2017] [Accepted: 08/03/2017] [Indexed: 01/10/2023]
Abstract
Sleep is necessary for the survival of all mammalian life. In humans, recent investigations have generated critical data on the relationship between sleep and ecology in small-scale societies. Here, we report the technological and social strategies used to alter sleep environments and influence sleep duration and quality among a population of hunter-gatherers, the Hadza of Tanzania. Specifically, we investigated the effects that grass huts, sound levels, and fire had on sleep. We quantitatively compared thermal stress in outdoor environments to that found inside grass hut domiciles to test whether the huts function as thermoregulated microhabitats during the rainy season. Using physiological equivalent temperature (PET), we found that the grass huts provide sleep sites with less overall variation in thermal stress relative to outside baseline environments. We also investigated ambient acoustic measures of nighttime environments and found that sound significantly covaried with sleep-wake activity, with greater sound levels associating with less sleep. Finally, after controlling for ecological variables previously shown to influence sleep in this population, fire was shown to neither facilitate nor discourage sleep expression. Insofar as data among contemporary sub-tropical foragers can inform our understanding of past lifeways, we interpret our findings as suggesting that after the transition to full time terrestriality, it is likely that early Homo would have had novel opportunities to manipulate its environments in ways that could have significantly improved sleep quality. We further conclude that control over sleep environment would have been essential for migration to higher latitudes away from equatorial Africa.
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82
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Danchin A, Braham S. Coenzyme B12 synthesis as a baseline to study metabolite contribution of animal microbiota. Microb Biotechnol 2017; 10:688-701. [PMID: 28612402 PMCID: PMC5481537 DOI: 10.1111/1751-7915.12722] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023] Open
Abstract
Microbial communities thrive in a number of environments. Exploration of their microbiomes – their global genome – may reveal metabolic features that contribute to the development and welfare of their hosts, or chemical cleansing of environments. Yet we often lack final demonstration of their causal role in features of interest. The reason is that we do not have proper baselines that we could use to monitor how microbiota cope with key metabolites in the hosting environment. Here, focusing on animal gut microbiota, we describe the fate of cobalamins – metabolites of the B12 coenzyme family – that are essential for animals but synthesized only by prokaryotes. Microbiota produce the vitamin used in a variety of animals (and in algae). Coprophagy plays a role in its management. For coprophobic man, preliminary observations suggest that the gut microbial production of vitamin B12 plays only a limited role. By contrast, the vitamin is key for structuring microbiota. This implies that it is freely available in the environment. This can only result from lysis of the microbes that make it. A consequence for biotechnology applications is that, if valuable for their host, B12‐producing microbes should be sensitive to bacteriophages and colicins, or make spores.
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Affiliation(s)
- Antoine Danchin
- Institute of Cardiometabolism and Nutrition, Hôpital de la Pitié-Salpêtrière, 47 Boulevard de l'Hôpital, 75013, Paris, France
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83
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Williams AC, Hill LJ. Meat and Nicotinamide: A Causal Role in Human Evolution, History, and Demographics. Int J Tryptophan Res 2017; 10:1178646917704661. [PMID: 28579800 PMCID: PMC5417583 DOI: 10.1177/1178646917704661] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2016] [Accepted: 03/15/2017] [Indexed: 01/15/2023] Open
Abstract
Hunting for meat was a critical step in all animal and human evolution. A key brain-trophic element in meat is vitamin B3 / nicotinamide. The supply of meat and nicotinamide steadily increased from the Cambrian origin of animal predators ratcheting ever larger brains. This culminated in the 3-million-year evolution of Homo sapiens and our overall demographic success. We view human evolution, recent history, and agricultural and demographic transitions in the light of meat and nicotinamide intake. A biochemical and immunological switch is highlighted that affects fertility in the 'de novo' tryptophan-to-kynurenine-nicotinamide 'immune tolerance' pathway. Longevity relates to nicotinamide adenine dinucleotide consumer pathways. High meat intake correlates with moderate fertility, high intelligence, good health, and longevity with consequent population stability, whereas low meat/high cereal intake (short of starvation) correlates with high fertility, disease, and population booms and busts. Too high a meat intake and fertility falls below replacement levels. Reducing variances in meat consumption might help stabilise population growth and improve human capital.
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Affiliation(s)
- Adrian C Williams
- Department of Neurology, University Hospitals Birmingham NHS Foundation Trust, Birmingham, UK
| | - Lisa J Hill
- Neuroscience and Ophthalmology Research Group, Institute of Inflammation and Ageing, University of Birmingham, Birmingham, UK
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